The truck is basically stock, except I have installed a Heath wastegate controller (spring type).  Truck has 270K on it.

 

I finally installed fuel and boost pressure gauges in my 96.  When cold fuel pressure is 30 pounds at idle, 38 pounds at 2000 rpm's. At operating temp idle pressure is 22, at 2000 rpm's 32 - 34.  Is this with in specs?

My boost running down the road with my my car trailer on hauling a ton is 6 - 8 pounds.  Maximum boost that I can get is 28 pounds.  Again is this good or could it be better?

 

Bob

Boost sounds about right for a wastegated HY, and possibly a stock injectors truck with an HX.

 

What trans are you running?

 

Fuel pressure doesn’t sound normal to me. What lift pump are you running? Where is it being measured?

P-pump fuel pressure sounds about right. Mechanical lift pump tends to lose volume in the higher RPM range. This is normal.

 

Boost is resulting typically of spent fuel. Like what I'm learning with the Quadzilla on the 24V engine as you retard timing you can increase boost but at a loss of efficiency. Then if you advance timing you push more of the burning cycle in the cylinder making the boost lower and EGT's lower. Sad but true a P7100 is a static timing pump that has no advancement. 

Well that’s what I get for not looking at what section I’m replying to! ?‍♂️

15 minutes ago, notlimah said:

Well that’s what I get for not looking at what section I’m replying to! ?‍♂️

 

I almost fell into the same trap. Then I took another sip of coffee and the fuel pressure clicked that's 12V specs. 

I thought the boost was about right.  What is the max boost that a stock engine can handle?  I was thinking the fuel pressure was high, but glad to hear it's OK.

 

Bob